Terrifying footage of house party brawl

TERRIFYING footage has surfaced of an out-of-control house party - which forced a mother to hide her newborn baby from violent revellers.

The teen host's father was also knocked unconscious and left with a broken jaw in the Saturday night festivities in Perth, according to local media reports.

CCTV shows a mob of more than 60 young men and women fighting and a fence post and a brick being thrown though a rear glass door - which police say narrowly missed a newborn baby inside.

Some of the revellers can be seen pelting the house with objects. Picture: Channel 9

"Several calls were made to police after uninvited guests began smashing bottles in the backyard of a house, and began spilling out onto the street shortly before midnight," a WA Police spokesman told news.com.au.

"A brick was thrown through the window of a house narrowly missing a young baby and a man who confronted the brick thrower was knocked unconscious," he said.

The father was taken by ambulance to Rockingham Hospital and is in a stable condition.

According to local media reports, neighbours who tried to help calm the situation said they had bottles thrown at them, were struck with bricks and, in one instance, wounded with what may have been a shiv.